geoip-api

https://www.spigotmc.org/resources/api-geoip.28015/

What does it?

With this api you can get the location of an ip/player, it uses GeoLite data created by MaxMind http://www.maxmind.com. The api will automatically download the database from the maxmind mirror!

How to use?

//Get the ip from a player
InetAddress ip = player.getAddress().getAddress();

//Check if the ip is not null
if(ip == null){
   return;
}
 
//Check if the ip is not local    
if(ip.isAnyLocalAddress() || ip.isLoopbackAddress()){
   return;
}

//get the country, city & timezone of the user
GeoIP geo = new GeoIP(ip);
geo.countryName;
geo.city;
// etc

Plugin.yml

add this to your plugin.yml

depend: [GeoipAPI]